CHEM1102 Chemistry Model Assignment

1. Which one of the compoundsA-Eis a primary alcohol?

2. Which one of the compoundsA-Ewill react with NaOH inan acid-base reaction?

3. Which one of the compoundsA-Ewill react with HCl toform a quaternary ammonium salt?

4. Which one of the compoundsA-Ewill react withdimethylamine, (CH3)2NH, to give an amide?

5. Which one of the compoundsA-Ewill form a carboxylicacid upon treatment with acidified Na2Cr2O7solution?

6. Which one of the following is the most stable carbocation?

For questions 7 - 11, choose fromA - Ethe term that best describes the relationship between each of the following pairs of compounds.

A.Conformational IsomersB.Constitutional IsomersC.EnantiomersD.DiastereomersE.Identical Compounds

12. Which one of compoundsA - Ecan react with HCl in anelectrophilic addition reaction?

13. Which one of compoundsA - Ewill be formed upon theoxidation of 2-butanol?

14. Which one of compoundsA - Ewill react with NaBH4followed by aqueous acid to give a primary alcohol?

15. Which one of compoundsA - Eundergoes an eliminationreaction on treatment with hot alcoholic potassium hydroxide solution

16. Which one of compoundsA - Eis an example of a conjugatedmolecule?

17. Which one of compoundsA - Ewill form

2-methyl-2-bromobutane upon treatment with HBr?

18. Rank the following series of atoms in order of INCREASING electronegativity. N O F P As

AN < O>

BF < O>

CAs < P>

DAs < P>

EF < N>

19. Which one of the following combinations does the titration curve represent?

AAddition of a strong base to a weak acid

BAddition of a weak base to a strong acid

CAddition of a weak acid to a strong base

DAddition of a strong acid to a strong base

EAddition of a strong acid to a weak base

20. What is the value of the pKathat can be obtained from this titration curve?

A11.3

B10.0

C9.3

D5.3

E1.8

21. Which intermolecular forces are present in phenol, C6H5OH(s)?

ALondon dispersion only

BDipole-dipole only

CHydrogen-bonding only

DLondon dispersion and dipole-dipole

ELondon dispersion, dipole-dipole and hydrogen bonding

22. A catalyst speeds up a chemical reaction by

Achanging the stoichiometry.

Bincreasing the activation energy.

Cproviding an alternative reaction mechanism of lower activation energy.

Dshifting the equilibrium towards the side of the product(s).

Eincreasing the reaction enthalpy.

23. Which of the following gases can be liquefied at 25 C?

Gas Critical point

CH3Cl 144 C, 66 atm

SO2 158 C, 78 atm

CH4 82 C, 46 atm

ASO2only

BCH4only

CCH3Cl and SO2

Dall of them

Enone of them

24. A solid has a very high melting point, is very hard, and its liquid is non conducting. The compound is

Aa discrete molecular solid.

Ba metallic solid.

Ca covalent network solid.

Dan ionic solid.

Ean amorphous solid.

25. When one mole of ice melts to liquid at 0 C,

Athe entropy of the system decreases.

Bthe entropy of the system remains the same.

Cthe entropy of the system increases.

Dthe order of the system increases.

ENone of the above

26. The entropy of a chemical system will usually increase when

Aa molecule is broken down into two or more smaller fragments.

Ba reaction occurs that results in an increase in the moles of gas.

Ca solid changes to a liquid.

Da liquid changes into a gas.

EAll of the above

27. Arrange the common unit cells of metals from the least dense packing to the most dense packing.

Abody-centred cubic < face>

Bbody-centred cubic < simple>

Cface-centred cubic < simple>

Dsimple cubic < body-centred cubic < face>

Esimple cubic < face>

28. How many atoms are there in the face-centred cubic unit cell of iron?

A# atoms =18(8)= 1

B# atoms = 1 +18(8)= 2

C# atoms =12(6)= 3

D# atoms =12(6)+18(8)= 4

E# atoms = 1 +12(6)+18(8)= 5

29. The normal boiling point of a liquid is

Athe only temperature at which there can be equilibrium between the liquid and gas states.

Bthe temperature above which the substance cannot exist as a liquid regardless of the pressure.

Cthe temperature at which the entropy of the liquid is equal to zero.

Dthe temperature at which the vapour pressure of the liquid equals the ambient atmospheric pressure.

Ethe temperature at which the vapour pressure of the liquid equals 1 atm.

30. What is the geometry of the [Cr(OH2)6]3+ion?

Atetrahedral

Btrigonal bipyramidal

Csquare planar

Doctahedral

Elinea

31. What is the ground state electronic configuration of Fe3+?

A[Ar] 3s23p6

B[Ar] 4s23d4

C[Ar] 4s23d3

D[Ar] 4s03d84p2

E[Ar] 4s03d5

32. Which of the following species exist as isomers?

[Co(NH3)6]3+, [PtCl2(NH3)2], Co(OH2)6Cl3, [Co(OH2)6]2+, [CdI4]2

A[PtCl2(NH3)2] and [Co(OH2)6]Cl3

B[PtCl2(NH3)2] only

C[CdI4]2only

D[Co(NH3)6]3+and [Co(OH2)6]2+

E[Co(OH2)6]Cl3and [Co(OH2)6]2+

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